प्रियङ्गूणामर्धं सारो नवभागवृद्धिश्च ॥ कZ_०२.१५.२६ ॥
priyaṅgūṇām ardhaṃ sāro navabhāgavṛddhiś ca
For priyaṅgu, the core yield (sāra) is one-half, and there is also an increase measured as one-ninth (navabhāga-vṛddhi).
Because standardized handling (e.g., cleaning, drying, settling, or volumetric changes) can change measurable quantity; the state fixes an allowed factor to prevent disputes and fraud.